Chuck



(No Model.)

W. O. OBERNESSER.

GHUGK.

No. 593,681.y Patented Nov. 16, 1897.

.Z @3.5i j, (6J.

'fyf/d,

' wlTNEssEs www @www NToR www@ @g2 UNITED STATES PATENT OFFICE.

WILLIAM O. OBERNESSER, OF HAMILTON, OHIO.

CHUCK.

SPECIFICATION forming part of Letters Patent No. 593,681,01etea November1e, 1897.

Appiicerieafiied Ju`ne1,1897. serielne. 638,944. (remodel.)

To all whom it may concern,.-

Be it known that'I, WILLIAM C. OBERNEs- SER, a citizen of the UnitedStates, residing at Hamilton, inthe county of Butler and State of Ohio,have invented certain new and useful Improvements in Chucks, of whichthe following is a specication.

My invention relates to improvements in chucks for shapers, planers, andsimilar metal-working machines inwhich the clamping-jaws are adjustablein different horizontal angles in relation to each other and to thebase; and the objects of my improvement are to facilitate its-action andincrease its efficiency by means that will appear from the followingdescription, as illustrated in the accompanying drawings, in which-Figure 1 is a longitudinal vertical section; Fig. 2, a front elevation;Fig. 3, a side elevation; Fig. 4, a plan, and Figs. 5, 6, 7, 8, 9, and10 details of construction.

In the drawings, 1 represents the baseplate; 3, a bearin g formedtherein. Annular seat 4 is in the bearing for nut 5. Slot 6 extends fromthe edge of the base to saidseat. Stationary j aw- 7 extends verticallyabove the end of pivot-plate 8 and is formed integral therewith. Saidvplate is pivotally mounted on the base by means of pivot 9, thatdepends therefrom and movably engages with bearing 3. The end portion ofsaid pivot is reduced in size and threaded to receive nut 5, thatsecures plate 8 in any desired horizontal angle to the base The nut isadjusted by means of a rod or tool being inserted through slot 6 in thebase and engaging with holes 11, formed in the periphery of said nut.

Groove 12, resembling a dovetail in crosssection, is formed in the topsurface of pivotplate 8. Its rear portion terminates in the form of asemicircle and forms the rear half of the bearing for flanged pivot 13,that depends from table 14. Slide 15 is movable in groove 12, and itsrear end terminates in the form ofa semicircular flanged gap to form thefront half of the bearing for pivot 13.

By means of screw 16 the slide may be caused to clamp pivot 13 andsecurely hold table 14 in different horizontal angles to stationary jaw7, or permit it to move freely to diiferent angles in relation thereto,as desired.

Movable jaw 17, carried by top plate 18,

- each other.

corresponds in size and form with stationary jaw 7. its under surface toreceive table v14, and whereon said top plate is longitudinallyadjustable by means of screw 19. The movement of the top plate in thismanner carries causes 'articles to be securely clamped between them.Said screw 19 is journaled in lug 21, that depends below the front endof the-top plate and engages with nut 22, that is secured on table 14.Longitudinal recess 23 is formed in the under side of the top plate topermit said plate to move freely over nut 22. Supplementary jaws 2 and24 are attached to the respective jaws 7 and 17. rlhe respective ends ofjaws 7 and 17 are formed with parallel gaps 25, that slant downwardlyand outwardly. Parallel wings 26, formed on the extremities of thesupplementary jaws, slide in the corresponding gaps 25. Springs 27,situated Vbehind the supplementary jaws, force them upwardly and towardThe extent of this movement is limitedv by pins 28, inserted throughslots 29 in wings 26. A

A modified form of construction is shown in Fig. 7 ,.wherein the face ofstationary jaw 7, as well as movable jaw 17, may be formed with a seriesof parallel transverse grooves 3l, that slant in a downward direction.The supplementary jaws attached thereto may be formed with a series ofparallel transverse ribs 32 to correspond in slant with said grooves andmovably engage therein.

In operation the chuck is secured to the table of the shaper or othermachine. The pivot-plate is adjusted to the desired angle to thedirection of movement of the cuttingtool. The article to be operatedupon is placed between the supplementary jaws, wherein it is clamped bythe rearward movement of the top plate, being effected by means of screw19. With the approach of movable jaw 17- toward the stationary jaw 7springs 27 press the supplementary jaws against the article placedbetween them. As the movement of the top plate is continued theresistance of the springs .is overcome and the supplementary jaws areforced in a downward direction corresponding to the slant of wings 26.By means of the frctional contact of the Said top plate contains agroove in IOO - supplementary jaws against the article between them itis forced down and securely held in position on table 14. To clampwedgeshaped or tapering articles, the pressure of slide 15 on pivot 13may be relieved by means of screw 16. Table 14c and the top plate-arethen freely movable on anged pivot 13 to different angles. This willpermit the movable jaw 17 to automatically adjust itself to thenecessaryangle to correspond with the article being clamped. The samedownward pull will be exerted on the article by the downward movement ofthe supplementary jaws. The clamped article will thus be iirmly seatedon table 14E without the necessity for the use of a hammer thatfrequently causes injury to the article or to the chuck and at best is anoisy and ineffectual expedient.

Having fully described my improvements, what I claim, and desire tosecure by Letters Patent of the United States, is-

1. In a chuck, the combination, with a plate or table, of a jaw movablyconnected therewith, said jaw being provided with gaps or bearings onits respective opposite sides or ends, said gaps being parallel witheach other and slanting downwardly and rearwardly from the face of thejaw, a supplementary jaw provided with rearwardly and downwardlyprojecting wings adapted to slide in said gaps, whereby thesupplementary jaw is movable simultaneously toward the chuckjaw and thebase-plate, means for limiting the movement of the supplementary jaw,and a spring between the said jaws, substantially as shown and for thepurpose specified.

2. The combination with a base, a stationary jaw pivotally adjustablethereon, a jaw movably connected with the stationary jaw, andautomatically adjustable to different horizontal angles therewith, andmeans to actuate the movable j aw, of supplementary jaws movablyattached to the respective statio11- ary and movable jaws andconstructed and arranged to exert simultaneously a downward and clampingpressure on an article placed between them.

WILLIAM C. OBERNESSER.

IVitnesses:

ROBERT S. CARP., C. H. SCHELL.

